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I tried to run though a key on this rather poor image and to my surprise, I could quite easily end up with Gymnochiromyia inermis.

There are only three genera listed for Hungary and only two of them have entirely yellow species. Chiromya has a different head shape, so we end up with Gymnochiromyia. There are only two species that have brown ocellar triangle, and only one of these have yellow abdomenal tergites. - G. inermis.


So I label this as Gymnochiromyia inermis cf.
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